我正在尝试使用
ruby(1.8.6)中的“open-uri”来处理链接列表中的内容,但是当一个链接断开或需要身份验证时我收到错误时会发生错误：
open-uri.rb:277:in `open_http': 404 Not Found (OpenURI::HTTPError) from C:/tools/Ruby/lib/ruby/1.8/open-uri.rb:616:in `buffer_open' from C:/tools/Ruby/lib/ruby/1.8/open-uri.rb:164:in `open_loop' from C:/tools/Ruby/lib/ruby/1.8/open-uri.rb:162:in `catch'
要么
C:/tools/Ruby/lib/ruby/1.8/net/http.rb:560:in `initialize': getaddrinfo: no address associated with hostname. (SocketError) from C:/tools/Ruby/lib/ruby/1.8/net/http.rb:560:in `open' from C:/tools/Ruby/lib/ruby/1.8/net/http.rb:560:in `connect' from C:/tools/Ruby/lib/ruby/1.8/timeout.rb:53:in `timeout'
要么
C:/tools/Ruby/lib/ruby/1.8/net/protocol.rb:133:in `sysread': An existing connection was forcibly closed by the remote host. (Errno::ECONNRESET) from C:/tools/Ruby/lib/ruby/1.8/net/protocol.rb:133:in `rbuf_fill' from C:/tools/Ruby/lib/ruby/1.8/timeout.rb:62:in `timeout' from C:/tools/Ruby/lib/ruby/1.8/timeout.rb:93:in `timeout'
有没有办法在处理任何数据之前测试响应(url)？
代码是：
require 'open-uri'
smth.css.each do |item|
open('item[:name]','wb') do |file|
file << open('item[:href]').read
end
end
非常感谢
解决方法
你可以试试一下
require 'open-uri'
smth.css.each do |item|
begin
open('item[:name]','wb') do |file|
file << open('item[:href]').read
end
rescue => e
case e
when OpenURI::HTTPError
# do something
when SocketError
# do something else
else
raise e
end
rescue SystemCallError => e
if e === Errno::ECONNRESET
# do something else
else
raise e
end
end
end
我不知道在没有打开和尝试的情况下测试连接的任何方法,因此挽救这些错误将是我能想到的唯一方法.需要注意的是,OpenURI :: HTTPError和SocketError都是StandardError的子类,而Errno :: ECONNRESET是SystemCallError的子类.所以rescue => e不会捕获Errno :: ECONNRESET.